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Optimization of the Vertical Comb Actuator Design for the Micrormirror
진주영(Joo-Young Jin),박재형(Jae-Hyoung Park),유병욱(Byung-Wook Yoo),김용권(Yong-Kweon Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.11
This paper presents the optimum design method of the vertical comb actuator for the micrornirror. We establish an analytical model of the actuator operation, and then extract variables influencing a resonant frequency and a maximum tilt angle. Among variables, a distance R₁ between a rotation axis and a movable comb tip is revealed to be a dominant factor for the large tilt angle with low voltage. R₁ has a significant effect also on the resonant frequency as well as the maximum tilt angle. Because a tradeoff between the resonant frequency and the maximum tilt angle is achieved by varying R₁ with other variables' fixed, the optimum design depends on choosing proper RI. An example for designing an l-DOF micromirror demonstrates dependance on R₁ for the optimum design.
중합효소연결반응에 의한 자연 수계에서의 mer 유전자 함유 세균 탐색
김상준,진주영,이현환,조기성 ( Sang Jun Kim,Joo Young Jin,Hyun Hwan Lee,Ki Seong Joh ) 한국환경생물학회 1995 환경생물 : 환경생물학회지 Vol.13 No.1
The distribution of bacteria resistant to mercury (Hg^r-bacteria) was investigated from the coastal water sample of Kwangyang bay and freshwater samples of Taeback area, mer gene was also detected from the isolated Hg^r-bacteria by PCR and colony hybridization using the probes which correspond to the conserved sequence of the reported Tn 21, Tn 501 and pMJ 100. The distribution of Hg^r-bacteria at Kwangyang bay among the total number of heterotrophic bacteria grown on agar media was 0 - 0.15% and 0.05 - 0.084% in Feb. and Apr. respectively. The distribution of those bacteria at Taeback area was 94. 55% in the upstream and 17.78% in the downstream of the valley. From the Hg^r-bacteria, about 1Kb of mer gene was amplified by PCR using the amplified mer gene as probe, the interrelationship between the Hg^r-bacteria and the existence of mer gene was investigated by colony hybridization. As a result, 82% and 70% of the Hg^r-bacteria have mer gene at Kwangyang and Taeback area, respectively.